check out "henson motors" on ebay, he has NGKs (get stock equiv) they will last longer then stockers and are a better made. and this guy runs a great deal on them. and his "best offer" prices are pretty low to. ive bought a few things from him now including plugs (ngk vpowers). he is an awesome dealer, and has fast shipping. i found him when i found my over the top spark plug wire removal kit
I've lost count of the number of threads I've read about problems with non-OEM spark plugs, especially the 4.7 and HEMI engines. For my 4.7 they are $14 at NAPA, and I change them every 20-30k.
So when you put expensive platinum plugs in your rig and you can't figure out why it runs like sh*t you were warned...
ehh, while we're on the topic (I think we can conclude that your best bet is to go with OEM replacements).. how difficult is it to replace the plugs yourself? Any special tools or skills required?
its easy. the hardest ones for me were by the fuse boxes, u just need to slide the extension in first then attach the wrench, no biggie. just make sure you have a small selection of extensions,
get a spark plug gap tool, i believe they are about $5 at auto zone. 13 ft lbs isnt much, you could buy a torque wrench, or just snug them in, then give them another bump. you dont need to force them, you could damage the head. but also make sure when you are first putting them in you just spin the extension with your fingers just to make sure you thread them correctly. once they seat and you know its not cross threaded use the wrench